M42 Great Nebula In Orion (187 X 20s @ ISO400)

Date: 28 December 2013

Equipment: Skywatcher Explorer 150P, EQ3-2 with dual-axis motor drive, Skywatcher 0.9x Coma Corrector, Canon EOS 1100D

Exposure: 187 x 20s @ ISO400 with relevant dark, bias and flat frames

Processing: Exposures captured with Astrophotography Tool, raw files (cr2) stacked with Deep Sky Stacker Beta, curves adjusted, background removed and noise filter applied with Fitswork.

Location: London, England

Frustrated with having to discard most of my images due to vibrations affecting the EQ3-2 mount, I decided to take only short exposures so I could keep 90+% of my data. 20s exposures were chosen and this was the first result.